Band applying mechanism



March 27, 1951 J. F. CRAWFORD BAND APPLYING MECHANISM 4 Sheets-Sheet 1Filed April 28, 1945 ML yINVL-TNTOR.

A TTORNEY March 27, 1951 J, F, CRAWFORD 2,546,496

BAND APPLYING MECHANISM INVENTOR.

ATTORNEY 4 Sheets-Sheet 3 ATTORNEY March 27, 1951 J. F. CRAWFORD BANDAPPLYING MECHANISM Filed April 28, 1945 7 v /2 q INVENTOR March 27, 1951J. F. CRAWFORD 2,546,496

' BAND APPLYING MECHANISM Filed April 28, 1945 4 Sheets-Sheet 4 IN V ENTOR.

ATTORNEY Patented Mar. 27, 1951 UNITED STATES ENT OFFICE BAND APPLYINGMECHANISM John F. Crawford, Racine, Wis, assignor to J. 1. Case Company,Racinal/Jis, a corporation of Wisconsin 3 Claims.

The present invention relates to devices for placing and securing ringsin place on grooved round objects and a purpose of the invention is togenerally improve the construction and operation of devices of thisclass. More specifically, an object of the invention is to provide a newmechanism for placing a rotating band on a shell case.

Other objects and advantages will become apparent from the followingspecification and the annexed drawings in which a satisfactoryembodimcnt is shown. However, it is to be understood that the inventionis not limited to the details disclosed but includes all such variationsand modifications as fall within the spirit of the invention as hereinexpressed.

In the drawings, Figure 1 is an elevation of the machine looking towardthe exit side thereof, parts being broken away.

Fig. 2 is a similar View of the machine taken from the operatorsposition.

Fig. 3 is an enlarged fragmentary elevation showing in detail some ofthe mechanism indicated in Fig. 1.

Fig. 4 is a vertical sectional view taken on the line l-i of Fig. 3.

Fig. 5 is an enlarged detail of certain mechaanism indicated in Fig. 3.

Fig. 6 is a sectional View taken on the line fi'8 of Fig. 5.

Fig. 7 is a view similar to Fig. 5 of a modification of the device for aslightly different operation.

Fig. 8 is a sectional view taken on the line 8-l of Fig. '7.

Fig. 9 is an enlarged detail of certain mechanism indicated in Fig. 4showing the parts in a different position.

Similar reference characters have been ap plied to the same partsthroughout the drawings and specification.

Referring to Fig. 2, the machine is interposed in a suitable conveyor 0which delivers the ch jects to be treated and conveys away the finishederally designated as Hi carried by a base l5 in the present instance ofbox-like form. Base i5 has pivoted thereto at it an air or othersuitable fiuid cylinder or motor i! of well-known form, not necessary todescribe in detail since it forms no part of the present invention.Cylinder i! has a piston rod is which is pivoted as by a pin E9 to anarm 2t. Arm 20, as best seen in Fig. 3, is suitably fastened as byscrews 2| to a ring-like rim element 22 of an oscillatable disk 23, Fig.4. Disk 23 is piloted on a boss 2 2 carried by above mentioned housing ii. Boss 24 has a central opening sufficient to admit shell S and whichopening is suitably aligned with above mentioned conveyor C.

Rim 22 can be oscillated about boss 24 and serves as part of a togglemechanism for developing the necessary pressure on ring 13.

A plurality of pressing fingers as 25, 26, 2! and 28 aredisposedgenerally radiall within rim 22 and directed toward a regionadjacent the central opening in boss 2%. Fingers 24 to 28 have inner endport-ions 259, 3G, 3! and 32 which are arranged contiguous relation asperhaps best seen in Fig. 5. It is to be understood that fingers 25, 26,

and 2'! are duplicated as many times as necessary to extend entirelyaround the above mentioned central opening. Collectively, the inner endsof these numerous fingers define an inner surface of revolution which issubstantially continuous and generally designated as 33.

The several fingers at their inner ends are restrained fromcircumferential movement and it will now be apparent that oscillating ofrim 22 so as to move the fingers from a position at an angle to radiifrom the center of boss 26 to a radial position, will caus inwardmovement of said inner end portions which, if resisted, will developenormous inward pressure with only moderate exertion of force on arm 20by piston rod l8.

It is not necessary to pilot each individual finger 25, 2t, 2?, etc. Inthe present instance, fingers 25 and 28 are provided with laterallyextending cars 34 and 35 respectively, as best seen in Fig. 6. Ears asand 35 engage suitable notches in a ring 36 carried in a cover 3'!enclosing housing M and fixed thereto in any suitable manner as byscrews 38. A similar ring 39, fixed in box 34-, engages cars do and M onthe opposite sides of fingers 25 and 23 from above mentioned ears 3d and35. Fingers 26 and 27 occupying substantially all the space betweenfingers 25 and 28, cannot move circumferentially because of theresistance to such movement of fingers 25 and 28. It is to be understoodthat while 4 fingers only 3 have been described in detail, the entireinterior of rim 22 is occupied by similar fingers. The 1atter beingidentical with the described fingers, need not be further explained.

Cover plate 3'! has a boss 32 carrying above mentioned ring 36 andbosses 2d and :22 engage the edges of fingers 25, 25, etc, to maintainthem in properly aligned position.

Each of fingers 25, 26, etc., is provided with a pin 33, preferablyloosely engaged in an opening 44 in disk 23. The outer ends, however, ofthe several fingers are rounded as at 45 and seated in recesses as 46 inrim 22*. In this manner, an ample bearing is secured between the fingersand rim 22 to withstand the very substantial pressure exerted betweenthe fingers and rim as the true radial position or dead center positionis approached. Since pins 43 are merely for retaining the fingers inplace, they do not need to stand any substantial pressure.

With the mechanism so far described, sufficient pressure can bedeveloped to compress the metal band radially and cause it literally toflow into the contours of groove 52. 1t is to be noted that this is doneat room temperature, no heating of the parts being necessary.

As will be apparent, if ring i3 is to enter into groove E2, the one mustbe properly aligned with the other before pressure is applied. In thepresent instance, this is accomplished in the manner best shown in Fig.4. Within the above mentioned central bore of boss M is secured agauging unit or locating bushing 47 Which bushing extends within ring 3Sso as to locate ring I3 in a predetermined position relative to fingers25, 26, etc. Thus ring I3 when inserted into the machine from the left,as seen in Fig. 4, will stop in abutting relation to bushing 47. Ring i3is thus readily located.

Shell S is located by a removable gauging unit or cap generallydesignated as $8 which has a rim 49 engageable with the outer surface ofcover plate 3?. Cap 28 encloses the butt end of the shell S and has oneor more buttons or locating portions 59 which contact said end and limitits movement when the shell is urged to the left. Cap 48 also has aninwardly directed annular extension which engages above mentioned ringl3 and prevents its displacement to the left so that ring [3 and shell Sare definitely and properly located in relation to each other.

Cap 48 has a handle 52 by which it may be readily removed and replacedand it is held in position with rim G9 in contact with cover plate 31 bymeans of a notched plate 53 having buttons 54 engaging cap 43.

Plate 53, as seen in Fig. 2, is carried on a combination control andlocating bar or device 55 and is normally removed from the path of shellS on conveyor C. Bar 55 is fixed with a shaft 55 journaled at 5! in anappropriate part of housing l4 and has a grip portion 58 and a portion59, portion 59 serving to urge shell S to the left as seen in Figs. 2'and 4. For this purpose, portion 59 carries a notched plate 69 havingspaced therefrom by springs as 6! a plate 62 provided with lips E363.When above mentioned plate 53 locates cap 48, plate 63, through spring6! will urge shell S to the left into firm engagement with buttons 50within cap 48, lip 63 guiding plate 52 into position at the right end ofshell S with accompanying compression of springs 6|.

The notch in plate 53 clears above mentioned handle 52 and the notchesin plates 60 and 62 clear a protecting plug 64 commonly carried in 4 thenose of shells of this character during processing to protect them fromdamage.

As heretofore suggested and for the purpose of saving as much time aspossible, bar controls the action of cylinder H simultaneously withgauging the location of shell S and ring l3. Thus pulling forwardly ongrip portion 58, as seen in Fig. 2, places plates 53 and 62 in gaugingrelation with shell S and cap 48. At the same time, as more particularlyshown in Fig. 1, such movement, through an arm 65 fixed with abovementioned shaft 56 actuates, through a link 36 and a lever 51, a valveof well-known type 63. Valve 88 controls pressure fluid from a supplypipe 65; causing it to actuate piston rod 18 in the desired directionaccording to the position of grip portion 58. In the present instance,most of the movement of portion 58 is used in positioning plates 53 and62, the last portion of the movement, after the plates are in place,causing actuation of piston rod i8 and performing the compressingoperation.

After the compressing is complete, control bar 55 and valve 5'? arereturned to the position shown in Fig. 1 whereupon piston rod I8 isreturned and fingers 25, 26, etc. returned to the dotted position ofFig. 5. Cap 38 is then removed by means of handle 52 and shell S pushedto the left on rollers II to a subsequent operation.

In the modification of the device, seen in Figs. 7 and 8, the sameprinciple of developing heavy radial pressure is utilized, most of theparts being substantially identical with those just described.Accordingly, only the distinctive parts will be described in detail.

Rings of the type contemplated are used for the purpose of giving to ashell its initial spin when fired from a gun. The rings must thereforebe non-rotatively united with the shells. For this purpose, the groovel2 in shell S is formed with a plurality of circumferential ribs iii.Prior to the application of band I3, ribs It are provided with nicks ornotches Ii-4| into which the metal of ring 43 may be forced by thepressure of above mentioned fingers 25, 26, etc.

In the present instance, fingers as 72 and T3 are seated in a ringsubstantially identical with above mentioned ring 22, fingers 12 beingprovided with ears it engaged in suitable notches as T5 in rings 18occupying similar positions to above mentioned rings 3% and 39. Thusfingers l2 and '53 are urged inwardly by oscillation of the outer ringin the manner above described for Fig. 5. Fingers 12' and 13, however,have wedge-like points I? and the travel of the parts is so proportionedthat upon actuation of fingers i2 and 13 into substantially true radialpositions, as seen in full lines in Fig. '7, points I? will encounterribs lii and produce nicks or notches H desired. In their retracted orangular position,

seen in dotted lines in Fig. '7, points H are withdrawn for enough toclear the outer diameter of shell S as is apparent.

Since the location of shel S for this operation is much less criticalthan for applying band l3, any simple well-known gauging device issuflicient for locating the shell With sufficient accuracy.

Commonly the modification shown in Figs. 7 and 8 and the machine shownin the remaining figures are interposed successively in conveyor C sothat shell S first stops at the Fig. 7 embodiment and receive nicks "Hwhereupon it i immediately passed on to the Fig. 1 embodiment where itreceives band l3.

In operation, the attendant places the ring l3 against gauge 4'! andslides shell S approximately into place, applies cap 48 and pullsdownwardly on grip 58. The compressing operation is complete in a fewseconds whereupon the pressure is released with raising of grip 58, cap48 is removed and the shell passed on over conveyor C to the nextoperation.

The above being a complete description of the novel illustrativeembodiments of shell banding machinery, that which is claimed as new anddesired to be secured by Letters Patent of the United States is:

1. A compressing finger arrangement for use in a band compressingmachine including a hollow disk-like housing having an oscillatablecircumferential rim member therein, said housing providing a centralobject receiving aperture, a plurality of compressing fingers inwardlydirected from said rim toward said aperture, spaced notched ringsencircling said aperture, within said housing and means connected withsaid oscillatable circumferential rim member, operable upon actuation tooscillate said rim member; each of said fingers including a roundedouter end engaged with said oscillatable circumferential rim member, anda relatively thin inner work engaging end, and certain of said fingersconstituting guiding fingers, each having a pair of guiding cars at eachoutward side of said fingers of a thickness greater than and projectingcircumferentially from said work engaging end, on opposite sides of suchfingers and engaged with notches of said rings to substantially preventcircum'ferential movement of the inner ends of such fingers, but toprovide fOr relatively free radial movement thereof, and a plurality ofother fingers, the spaces between said guiding fingers receiving atleast one of said other fingers so as to be guided thereby, at least oneof said fingers located in each said spaces being disposed in closeproximity to the projecting ear side of each of said first mentionedfingers and received between the projecting ears of its correspondingfirst mentioned finger whereby a larger number of work engaging ends maybe provided around said object receivin aperture than would be possibleif all of the fingers were provided with guiding ears.

2. A hand compressor comprising, a work positioning gauging means, and aband compressing device, said device having a housing providing asubstantially horizontal openingadapted to receive a band and an objectwithin the band about which said band is to be compressed, meansadjacent the perim'eter of said opening for compressing the band; saidgauging means comprising the combination of a cup-like device having arim engaging the housing at the margins of said substantially horizontalopening when urged in one direction and an annular extension projectingwithin said opening into locating engagement with said band, saidcup-like device including a head portion spaced outwardly from saidopening providing a locating portion contacting an object within saidcup-like device when said object is urged in the other direction tolocate said object in a predetermined position in relation to saidcup-like device, and consequently in relation to said band, and alocating device shiftably supported on said band compressing deviceoutside the opening, means on said locating device for engaging saidcup-like device for urging it in the first mentioned direction andthereby maintaining it in place in said opening with said rim againstthe margins thereof, and means on said locating device for engaging saidobject to urge it in the second mentioned direction to press it intosaid cup-like device against said locating portion, said locating devicebeing shiftable to a position clear of said opening to provide forremoval of said cup-like device and for progress of objects entirelythrough said opening.

3. A band compressor as set forth in claim 2 including, a motor foractuating said compressing means, a control for said motor, means forshifting said locating device, and a connection between said shiftingmeans and said control for actuating said control when said locatingdevice is shifted to said gauging position.

JOHN F. CRAWFORD.

REFERENCES CITED The following references are of record in the file ofthis patent:

UNITED STATES PATENTS Number Name Date 320,159 Mulvaney June 16, 1885585,997 Zeller July 6, 1897 758,195 Schweinert et al. Apr. 26, 19041,233,343 Grenelle July 17, 1917 1,492,126 Fernald Apr. 29, 19241,563,941 Wichmann Dec. 1, 1925 2,291,803 Grotnes Aug. 4, 1942

